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' N. M. WATSON.

ELECTRICAL ANNUNGIATOR. N0. 514,975. Patented Feb. 20, 1894.

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(No Model.) 2 SheetsSheet 2.

N. M. WATSON.

- ELEGTRIGAL ANNUNGIATOR. No. 514,975. Patented Feb. 20, 1894.

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nnnnnnnnnnnn a T NITED STATES PATENT OFFICE.

NELSON M. WATSON, OF DETROIT, MICHIGAN, ASSIGNOR TO ALFRED H. HEATH, WILLIAM B. HEATH, AND SARAH A. MILLARD, OF SAME PLACE.

ELECTRICALANNUNCIATOR.

SPECIFICATION forming part of Letters Patent No. 514,97 5, dated February 20, 1894.

Application filed July 7, 1892. Serial No.439,2l7. (No model.)

To all whom it may concerns 1 3e it known that I, NELSON M. WATSON, a c1t1 zen of the United States, residing at Detro1t,in the county of Wayne, State of Michigan, have invented certain new and useful Improvements in Electrical Annunciators;

and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whlch it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form apart of this specification.

This invention relates to new and useful lmprovements in electric annunciators, and consists in a certain construction and arrangement of parts, as hereinafter fully set forth, the essential features of which being pointed out particularly in the claims.

The object of the invention is to produce an annunciator of cheap and simple construction, that is elfective in operation, and which, at the call of any number, automatically sets-back the number previously called obviating the necessity of a separate operation to restore the annunciator after a call has been made. This object is attained by the mechanism illustrated in the accompanying drawings, in which' Figure 1 is a front elevation of the annunciator case. Fig. 2 is a rear elevation with the back of the case removed, showing the mechanism therein, and also showing the several electrical lines connected therewith, and the push buttons or circuit closers in said line- Fig. 3 is a vertical section on dotted line 3-3 of Fig. 2. Fig. 4: is atransverse section on dotted line 44 of Fig. 2. Fig. 5 is a perspective view of the base plate on which the annunciator mechanism ismounted. Fig. 6 is an enlarged isometrical view of the target supporting armature, and Fig. 7 is an enlarged perspective of one of the targets.

Referring to the letters and figures of referonce, A designates the case which contains the annunciator mechanism, This case may be of any suitable size and form, and is provided in the front thereof with a series of numerals or indicatingcharacters, and a series of apertures or ports B opposite said characters,

through which a target is displayed when a call is made from the circuit closer corresponding with the opposed number. Said case having a glass in the front thereof through which said ports and exposed targets may be seen.

Located within the case and attached to the front thereof, is a base-plate 0 having the apertures B that register with the apertures B in the front of the case. Mounted on said plate 0 is a series of magnets D, arranged opposite the ports B. Said magnets being attached to the studs a, which are struck out of the plate 0 and stand at right angles thereto, as clearly shown in Fig. 5. The spools of said magnets are each connected through their respective lines, with the push-button or circuit closers 1, 2, 3, 4:, and 5, which are in open circuit with the battery E, as shown in Fig. 2. V

F designates the armatures of said magnets, which are provided with an integral arm I) having a target a at its free end, and having a pin e struck out of said arm and which projects laterally therefrom (see Fig. 7).

Formed on the opposite side of the armature from the arm I) and extending parallel therewith, is an ear (:1 having an aperture therein that registers with a like aperture in the arm b. Through said apertures, a screw or threaded pin 1' is passed and screwed into the plate 0, by which means, the armatures with their target bearing arms are pivotally mounted before the magnets, in such position that, when attracted by said magnets, the targets 0 will be raised and displayed through the ports B. Projecting from the plate 0 is a series of pins 0, upon which the arms of the armatures rest when in their normal position, and which support said arms'so as to maintain the armatures within the field of the magnets. On the opposite side of the plate C from the magnets D, is mounted an electro-magnet G, which is attached to the studs a struck out of said plate, like the studs (1. H designates the armature of said magnet, which is supported in a vertical position, and the ends of which, at-the outer edge, are journaled in the posts f attached. to the plate 0, whereby, said armature will swing horizontally, when attracted by its magnet. h indicates a post mounted in said plate, through which passes a screw 0' that bears against the armature H, and forms a back-stop therefor. At the bottom of said armature and engaging therewith, is a spring .9 which normally holds said armature against said back-stop. Formed on the inner edge of the armature II, is a series of spring catches t, that are adapted to engage the pins 0 of the arms I), when said arms are raised by their armatures, and retain the targets in an exposed position, through their respective ports. The coils of the spools D are in electrical contact with the base-plate C, as are also the coils of the magnet G the latter being connected with the battery through the line m.

I indicates an electro magnet which is mounted within the case, and actuates an ordinary electric-bell J. The coils of said magnet being electrically connected with the plate 0, and with the battery. It will now be understood, that, when the circuit is closed at any of the push-buttons, a current will flow through the corresponding magnet D, into the plate 0, and through said plate, and the magnets G, I to the battery. The magnet G being of high resistance diverts a portion of the currentthrough the magnet I. By which means all of said magnets are simultaneously energized, so that the magnet D attracts its armature to raise the target into view, at the same time the magnet G attracting the armature II, swings it upon its pivots, so as to withdraw the corresponding catch t thereon from the path of the pin 6 on the target arm I), enabling the target to swing freely into a position visible through a port in the case, as shown at c in Fig. 1, and by dotted lines in Fig. 2, at which time the concurrent ringing of the bell attracts attention to the number called. Which position of the parts is maintained while the current remains closed. \Vhen the push-button is released or the circuit broken, the springs acting upon the armature H swings it from the magnet G, so that one of the catches t thereon engages the pin e on the arm of the raised target and supports it in that position, whereby the call remains indicated until a subsequent call is made. Then anothercall is made, the swinging of the armature I-I disengages the catch thereon from the pin on the arm of the target previously raised, thereby causing said target to drop from View, the target only, whose armature was last attracted, remaining in sight, thus eifecting a self-restoring annunciator, or one that automatically setsback the preceding number called, and retains in sight the last call made.

If desired the magnet G may be cut out of the circuit, and operated by an independent line in which construction, the spring catches t on the vertical armature H, will yield sufficiently, when a call is made, to permit the pin e on the target arm, when raised, to slip over said catch and rest thereon to hold the target exposed. All the calls made would then remain in view, until the operator closed the circuit through the magnet G, and attracted armature H to let the targets fall. The construction shown, however, is preferred, as the annunciator is thereby rendered self-restoring.

By employing the baseplate C, which forms a part of the circuit, and upon which the mechanism is mounted in the manner shown, a simple, cheap and compact construction is effected, and one that is efficient in operation.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an annunciator, the combination with the electric circuit, of the magnet, the pivoted armature, the target actuated by said armature, and the movable spring catch for supporting the target in its visible position.

2. In an annunciator, the combination with the electric circuit, of the target actuating magnet, the armature of said magnet pivotally mounted and having the target formed integral therewith, the magnet G, the armature before said magnet, said armature being adapted to engage with and disengage from said target, to alternately support and release the target, for the purpose specified.

3. In an annunciator, the combination with the circuit having two limbs, the electricbell located in one of said limbs, the target actuating magnet, the pivotally mounted armature before said magnet, said armature having a target formed integral therewith, the magnet G, the armature thereof, said armature being adapted to alternately arrest and release said movable target.

4. In an annunciator, the combination with the circuit having two limbs, one of which contains a bell, the base plate connecting said limbs, the armature having the vibrating target formed thereon, the magnet adapted to actuate said target connected with said plate, the magnet Gin the other limb of said circuit and connected with said plate, and means actuated by said magnet G, for alternately supporting and releasing said target.

5. In an an nunciator, the combination with an electric-current, the electro-magnet, the pivoted armature provided with an internal arm extending therefrom, said arm having a target at its free end, and also havinga latterly projecting pin, the movable catch, and means for electrically and mechanically actuating said catch to engage said pin and support the target when raised, and disengage therefrom to permit said target to fall.

6. In an annunciator, the combination with an electric circuit, of the conducting plate therein, the studs struck from said plate, the magnets attached thereto, the coils of which are connected with said plate, said plate having the ports therein, the movable targets pivoted to said plate and adapted to be actuated by said magnets to expose them through said ports.

7. In an annunciator, the combination with an electric circuit, the target actuating mag- In testimony whereof I aflix mysignature in net, the pivoted armature of said magnet presence of two witnesses.

provided with an inte ral arm extending therefroinand carrying a, target at its free NELSON WATSON end, the target releasing magnet, the arma- Witnesses:

ture thereof being pivoted and provided with E. S. WHEELER,

a catch to support said target when raised. H. R. WHEELER. 

